In the twelfth year of Yongning, Liu Zhonghe, the censor Zhongcheng, investigated the secret affairs of Beirong and died suddenly of being poisoned by the strange poison "Duan Xian San". The skin is as white as porcelain, the blood vessels are broken like roots, and three black marks are burned on the soles of the feet. When he died, he only left half a riddle poem, and no one could explain it.
In the 22nd year of Yongning, the border army drug case broke out suddenly. Shen An's father and Yushi Zhongcheng, Shen Cijing, insisted on conducting a thorough investigation. Within a month, both of them were violently killed. The circumstances of death were exactly the same, and old cases were stirred up again.
Shen An follows the prince Xiao Cheng and helps him decipher the drug case, eliminate dissidents and consolidate his position.
The palace maid Fuling tried the poison and blocked the arrow for him. The candlelight flickered that night, and he saw the black marks on the soles of her shoes - exactly the same as the marks on the soles of the deceased's feet.
Concubine Shu is a chess piece, and the exchange of medicinal materials involves the shocking collusion between Beirong and the emperor's uncle and vassal king in southern Xinjiang; the king of Jin is pressing forward step by step, and the game of imperial power is turbulent. And that mysterious poem that no one understands was originally the last key left by the dead to the living.
The poison in the world can be cured by breaking the string. The human heart hides selfishness and desires, and there is no cure.
Intent: This is a story about "antidote" - there is an antidote to the broken string, but there is no cure for the shackles of greed, obsession, and life experience. Shen Cijing died to clarify his ambition, the King of Jin made atonement by fighting, the prince Xiao Cheng kept the bottom line between power and morality, and Shen An pursued the truth as a doctor. In the face of the righteousness of family and country, brothers can stand side by side; when love is not available, letting go is also a success. A package of counterfeit medicine leads to a drama about political intrigue, life experience, and family and country. When the antidote for Duanxian San is found, will there be a cure for the poison in the human heart?